Thanks. The jury is still out for me since I have not managed to get good results with SSB yet. The microphone I tried worked but the audio was noisy and sounded distorted. I decided to order the electret that Hans is using to put one more stake in the ground
before experimenting further. I think it may just be a matter of getting all the settings right. If I start with his mic, I stand a better chance at getting there.
Tony
AD0VC
toggle quoted message
Show quoted text
Hi Tony,
It’s good to hear that the calibration using TN0110 was similar to that of the BS170. I was initially concerned about SSB performance but when Hans mentioned his calibration technique, I had one of those Ah-Ha moments with hopes for a good outcome.
Thanks for running the calibration on both devices.
Over the past year or so, it seems we came to an unofficial conclusion that BS170s were blowing due to high drain voltage as a result of high SWR or exceeding 12VDC at the supply input rather than overheating due to high current. TN0110 has
a significantly higher drain voltage advantage over BS170 (100V vs 60V) and if it works well with SSB, I’ll be very happy. Keep us posted on your SSB adventure with TN0110.
Tony - AC9QY
On Sun, Mar 23, 2025 at 11:15?PM mux_folder2001 via
<canthony15=
[email protected]> wrote:
I have been running TN0110 finals and I calibrated my QMX+ with them. I wanted to see if the BS170 produced different curves so I installed BS170s and ran the calibration. When I was done, the finals were blown.
I wonder whether or not Hans is using the shaping when he is keying the radio for the cal sweeps.
The cal results didn't look substantially different from the TN0110 so I have gone back to the TN0110 and I am recalibrating.
Tony
AD0VC
